Aglaothamnion flexibile sp. nov. and Seirospora viridis sp. nov. (Ceramiaceae, Rhodophyta) from Puerto Rico

Aponte, Nilda E.; Ballantine, David L.

doi:10.2216/i0031-8884-34-2-102.1

Cited by 13 publications

(12 citation statements)

References 8 publications

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“…Bucher and Norris (1995) reported the species (also as A. latiaxis) to a maximum depth of 12 m from Martinique. This species is currently known only from Puerto Rico, where it was described from shelf edge habitats at 18 m depth (Aponte and Ballantine, 1995 (Ballantine and Aponte, 2005). As A. ogdeniae I.…”

Section: Ceramiales Callithamniaceaementioning

confidence: 99%

The Mesophotic, Coral Reef-Associated, Marine Algal Flora of Puerto Rico, Caribbean Sea

Ballantine¹,

Torres²,

Aponte³

2016

Smithsonian Contributions to Botany

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s m i t h s o n i a n c o n t r i b u t i o n s t o b o t a n y • n u m b e r 1 0 5 Smithsonian Institution Scholarly Press Smithsonian Institution Scholarly PressThe Mesophotic, Coral Reef-Associated, Marine Algal Flora of Puerto Rico, Caribbean Sea David L. Ballantine, Hector Ruiz Torres, and Nilda E. Aponte SERIES PUBLICATIONS OF THE SMITHSONIAN INSTITUTIONEmphasis upon publication as a means of "diffusing knowledge" was expressed by the first Secretary of the Smithsonian. In his formal plan for the Institution, Joseph Henry outlined a program that included the following statement: "It is proposed to publish a series of reports, giving an account of the new discoveries in science, and of the changes made from year to year in all branches of knowledge." This theme of basic research has been adhered to through the years by thousands of titles issued in series publications under the Smithsonian imprint, commencing with Smithsonian Contributions to Knowledge in 1848 and continuing with the following active series: s m i t h s o n i a n c o n t r i b u t i o n s t o b o t a n y • n u m b e r 1 0 5The Cover images, from left to right: Edge of insular shelf, offshore from La Parguera; technical divers' descent to the mesophotic; bottom habit, edge of insular shelf, "Weinberg," offshore from La Parguera. Published by SMITHSONIAN INSTITUTION SCHOLARLY PRESS

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Section: Ceramiales Callithamniaceaementioning

confidence: 99%

The Mesophotic, Coral Reef-Associated, Marine Algal Flora of Puerto Rico, Caribbean Sea

Ballantine¹,

Torres²,

Aponte³

2016

Smithsonian Contributions to Botany

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“…In contrast, the nuclei are terminal in all four species of Euptilota subtended by a single mucoid vesicle. Elsewhere, terminal nuclei are encountered in spermatangia of Sciurothamnion (De Clerck et al, 2002) and Seirospora (Feldmann-Mazoyer, 1941;Aponte & Ballantine, 1995;McIvor et al, 2002) and is the most common condition in the Ceramiaceae. The position of the nucleus in spermatangia, whether median or terminal, may prove to be diagnostic at the tribal level in the Ceramiaceae.…”

Section: Discussionmentioning

confidence: 99%

“…Contact and fusion of the connecting cell with the auxiliary cell take place as the auxiliary cell enlarges. In contrast, the carpogonium does not divide but enlarges horizontally and forms a pair of tubular protrusions directed inwardly toward each of the auxiliary cells in Seirospora orientalis (Kraft, 1988), S. occidentalis and S. viridis (Aponte & Ballantine, 1991, 1995, Sciurothamnion stegengae (De Clerck et al, 2002), and Euptilota. The fertilization nucleus (diploid nucleus) inside the carpogonium divides twice and two derivative nuclei enter the tubes and are cut off terminally inside prominent connecting cells adjacent to the auxiliary cells.…”

Section: Discussionmentioning

confidence: 99%

A morphological study and taxonomic revision of Euptilota (Ceramiaceae, Rhodophyta)

Hommersand

Clerck

Coppejans

2004

European Journal of Phycology

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A reassessment of the genus Euptilota reveals that it presently contains four validly published species: E. formosissima (Montagne) Ku¨tzing from New Zealand and the islands of the Campbell Plateau, E. articulata (J. Agardh) Schmitz from Australia, India, South Africa and Japan, E. fergusonii Cotton from the Indian Ocean, and E. molle (Wollaston) comb. nov., from the eastern part of South Africa. Euptilota pappeana Ku¨tzing from the Western Cape Province, South Africa, and E. mooreana Lindauer from New Zealand are excluded from the genus. Euptilota is characterized by: alternate-distichous branching at the apex, a prominent central axis covered by a small-celled outer cortex and with internal rhizoidal filaments, spermatangia with a terminal nucleus subtended by a single mucilage-containing vesicle, and fertile female periaxial cells borne in the plane of lateral branching. The carpogonium does not divide after fertilization and produces two tubular protuberances that are cut off as connecting cells. Traditionally placed in the tribe Ptiloteae, Euptilota appears to be more closely related to the Callithamnieae. As in the Callithamnieae, periaxial cells are cut off longitudinally in pairs from the fertile axial cell. One of each pair bears a horizontally oriented four-celled carpogonial branch and both cut off auxiliary cells after fertilization. Sterile group cells are absent. Connecting cells mediate transfer of the derivatives of the fertilization nucleus to the auxiliary cells. A diploid nucleus divides at the surface of an auxiliary cell and one daughter nucleus moves to its centre while the other is extruded into a residual cell. The haploid auxiliary cell nucleus is cut off into a foot cell. It is proposed that the closest relatives of Euptilota are Seirospora and Sciurothamnion.

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“…In Callithamnion corymbosum ( J. E. Smith) Lyngbye (Oltmans 1898) and Aglaothamnion halliae (Collins) Aponte, Ballantine and J. N. Norris (Hommersand 1997), the transfer of the diploid nucleus from the carpogonium to the auxiliary cell by means of small connecting cells and the subsequent formation of a residual cell on the auxiliary cell mirrors these processes as they occur in Sciurothamnion. Unlike Aglaothamnion and Callithamnion , however, the fertilized carpogonium of Sciurothamnion does not undergo a mitosis followed by cytokinesis (O'Kelly and Baca 1984, Hommersand 1997), although this is also true for Seirospora (Aponte and Ballantine 1991, 1995, Kraft 1988) and Carpothamnion (Wollaston 1992, as Thamnocarpus ). The carpogonia of two representatives of the Ptiloteae, Georgiella and Euptilota , apparently also do not divide after fertilization (Moe and Silva 1983, Hommersand and Fredericq 2001).…”

Section: Discussionmentioning

confidence: 99%

“…The different types of cells that eliminate extraneous nuclei from auxiliary cells appear to be genetically fixed within species, but their value as a diagnostic character at the genus and tribal levels in the Callithamnieae/Ptiloteae complex remains to be determined. Most representatives of the genus Seirospora possess two‐lobed foot cells (Feldmann‐Mazoyer 1941, Aponte and Ballantine 1995), but both foot and residual cells have been reported for Hirsutithallia (Womersley and Wollaston 1998, Fig. 121E, J), Aglaothamnion and Callithamnion (Oltmans 1898, Hommersand 1997).…”

Section: Discussionmentioning

confidence: 99%

MORPHOLOGY AND SYSTEMATICS OF SCIUROTHAMNION STEGENGAE GEN. ET SP. NOV. (CERAMIACEAE, RHODOPHYTA) FROM THE INDO‐PACIFIC¹

Clerck¹,

Kraft²,

Coppejans³

2002

Journal of Phycology

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A new ceramiaceous alga, Sciurothamnion stegengae De Clerck et Kraft, gen. et sp. nov., is described from the western Indian Ocean and the Philippines. Sciurothamnion appears related to the tribe Callithamnieae on the basis of the position and composition of its procarps and by the majority of post‐fertilization events. It differs, however, from all current members of the tribe by the presence of two periaxial cells bearing determinate laterals per axial cell. Additionally, unlike any present representative of the subfamily Callithamnioideae, no intercalary foot cell is formed after diploidization of the paired auxiliary cells. The genus is characterized by a terminal foot cell (“disposal cell”), which segregates the haploid nuclei of the diploidized auxiliary cell from the diploid zygote nucleus. The nature of three types of foot cells reported in the Ceramiaceae (intercalary foot cells containing only haploid nuclei, intercalary foot cells containing haploid nuclei and a diploid nucleus, and terminal foot cells containing only haploid nuclei) is discussed.

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Aglaothamnion flexibile sp. nov. and Seirospora viridis sp. nov. (Ceramiaceae, Rhodophyta) from Puerto Rico

Cited by 13 publications

References 8 publications

The Mesophotic, Coral Reef-Associated, Marine Algal Flora of Puerto Rico, Caribbean Sea

The Mesophotic, Coral Reef-Associated, Marine Algal Flora of Puerto Rico, Caribbean Sea

A morphological study and taxonomic revision of Euptilota (Ceramiaceae, Rhodophyta)

MORPHOLOGY AND SYSTEMATICS OF SCIUROTHAMNION STEGENGAE GEN. ET SP. NOV. (CERAMIACEAE, RHODOPHYTA) FROM THE INDO‐PACIFIC¹

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Aglaothamnion flexibile sp. nov. and Seirospora viridis sp. nov. (Ceramiaceae, Rhodophyta) from Puerto Rico

Cited by 13 publications

References 8 publications

The Mesophotic, Coral Reef-Associated, Marine Algal Flora of Puerto Rico, Caribbean Sea

The Mesophotic, Coral Reef-Associated, Marine Algal Flora of Puerto Rico, Caribbean Sea

A morphological study and taxonomic revision of Euptilota (Ceramiaceae, Rhodophyta)

MORPHOLOGY AND SYSTEMATICS OF SCIUROTHAMNION STEGENGAE GEN. ET SP. NOV. (CERAMIACEAE, RHODOPHYTA) FROM THE INDO‐PACIFIC1

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MORPHOLOGY AND SYSTEMATICS OF SCIUROTHAMNION STEGENGAE GEN. ET SP. NOV. (CERAMIACEAE, RHODOPHYTA) FROM THE INDO‐PACIFIC¹